Ignition distributor for internal combustion engines



W. WALTHER April 3, 1934.

5, 1952 2 Sheets-Sheet 1 Filed Oct April 3, 1934. w. WALTHER 7 1,953,913

IGNITION DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINES Filed Oct. 5, i932zsneets-sheet 2 Patented Apr. 3, 1934 UNITED STATES IGNITION DISTRIBUTORFOR INTERNAL COMBUSTION ENGINES Wilhelm Walther, Stuttgart, Germany,assignor to Robert Bosch Aktiengesellschaft, Stuttgart,

Germany Application October 5, 1932, Serial No. 636,401

' In Germany October 13, 1931 Claims.

The present invention relates to ignition distributors for internalcombustion engines and more particularly to means for securing aprotective cap and the distributor disc to the casing of thedistributor.

The object of the present invention is to produce a cheap arrangement,which is applicable both for the joint fastening of the distributor discand protective cap, as well as for the fastening of the distributor discalone in the absence of the protective cap. This is attained, accordingto the present invention in that the distributor disc is provided withprojections which support the protective cover and bear upon thedistributor casing, the protective cap being secured to the casing byholding means so that the projections are nipped between the cap and thecasing and the distributor disc thus secured in position.

An example of construction of the invention is shown in the drawings, inwhich:

Fig. 1 shows the distributor, partly in section,

Fig. 2 is a section of a part of, the top of the distributor on the lineAA of Fig. 1,

Fig. 3 is a side'elevation,

Fig. 4 is a plan view and Fig. 5 is a view of a' part of thedistributor.

A distributor shaft 3 is mounted in a neckbearing 1, which is enlargedabove to form a casdisc-Gis mounted on the rim of the casing 2 oftheinterrupter bymeans of a metal flange 7 moulded in the distributor discwhich consists of insulating material. On the flange '7 is seated aprotective cap of metal, consisting of two halves 8 and 9. The half 8 isseated on the flange 7, and

the half 9 on the half 8. The two halves of the protective cap are heldtogether by two swing-bolts 10, and together with the distributor disc,on the flange of which the protective cap is mounted, pressed on thecasing 2. The swing-bolts are mounted by means of pins 11 in slots 12 oftwo lugs 13 on the casing 2'. On the upper-half 9 of the protective cap2 are casttwo eyes 14 having slots 15 in which-the bolts 10 can beinserted and tightened by means of nuts 16. The flange '7 of thedistributor disc has in its turn also two lugs 16 having recesses 17(Fig. 5) The distributor disc 6 is so mounted on the casing 2 that thelugs 16 of the flange lie above the bearing lugs 13 for the swing-bolts,so that these latter can pass through the recesses 17. The lugs 16 arefor the purpose of being able to fasten the distributor disc on thecasing 2 even without the protective cap. The swing-bolts are in thiscase made correspondingly shorter.

The protective cap is to serve not only for protection against materialinjury or. against dirt ing 2 for an interrupter, and the distributorshaftmounted in said casing, said distributor disc being provided withmetallic projections supporting said protective cap and engaging saidcasing to provide an electrical connection between said cap and casing,and means for securing said cap and said disc to said casing.

2. An ignition distributor for internal combustion engines comprising acasing, a protective cap for said casing, a distributor disc, a rotarydistributor piece mounted in said casing, a metal flange moulded in saiddistributor disc, engaging said casing and forming a bearing surface forsaid protective cap, and holding means secured on said casing andengaging said protective cap to urge it onto said flange.

3. An ignition distributor for internal combustion engines comprising acasing, a protective cap for said casing divided c'n'cumferentially toform two parts, a distributor disc, a rotary distributor piece mountedin said casing, projections on said distributor disc supporting saidprotective cap and engaging said casing, and holding means secured onsaid casing and engaging said protective cap to urge it onto saidprojections.

4. An ignition distributor for internal combustion engines comprising acasing, a protective cap for said casing having at least two recessedears thereon, a distributor disc, a rotary distributor piece mounted insaid casing, a metal flange moulded in said distributor disc to form abearing surface for said'prct'ective cap and at least two swing boltsrevolubly mounted on said casing and engaging the recessed ears insaidprotecting cap to urge said cap onto said flange and said flange ontosaid casing.

5. An ignition distributor for internal combustion engines comprising a.casing, a metallic protective and electrical shielding cap for saidcasing having at least two recessed ears thereon, a distributor disc, arotating distributor piece, an

annular metal flange secured to said distributor

